com.jhlabs.math

Class ImageFunction2D

java.lang.Object

com.jhlabs.math.ImageFunction2D

All Implemented Interfaces:

Function2D

public class ImageFunction2D
extends java.lang.Object
implements Function2D

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	alpha
static int	CLAMP
protected int	edgeAction
protected int	height
protected int[]	pixels
protected int	width
static int	WRAP
static int	ZERO

Constructor Summary

Constructors

Constructor and Description
ImageFunction2D(java.awt.image.BufferedImage image)
ImageFunction2D(java.awt.image.BufferedImage image, boolean alpha)
ImageFunction2D(java.awt.image.BufferedImage image, int edgeAction, boolean alpha)
ImageFunction2D(java.awt.Image image)
ImageFunction2D(java.awt.Image image, int edgeAction, boolean alpha)
ImageFunction2D(int[] pixels, int width, int height, int edgeAction, boolean alpha)

Method Summary

Modifier and Type	Method and Description
float	evaluate(float x, float y) Evaluate the pixel and the x and y values according to the edge action.
int	getEdgeAction() Get the edgeAction.
int	getHeight() Get the height.
int[]	getPixels() Get the pixels.
int[]	getRGB(java.awt.image.BufferedImage image, int x, int y, int width, int height, int[] pixels) A convenience method for getting ARGB pixels from an image.
int	getWidth() Get the width.
void	init(int[] pixels, int width, int height, int edgeAction, boolean alpha) Initialize an image.
void	setEdgeAction(int edgeAction) Set the edgeAction.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ZERO

public static final int ZERO

See Also:

Constant Field Values

CLAMP

public static final int CLAMP

See Also:

Constant Field Values

WRAP

public static final int WRAP

See Also:

Constant Field Values

pixels

protected int[] pixels

width

protected int width

height

protected int height

edgeAction

protected int edgeAction

alpha

protected boolean alpha

Constructor Detail

ImageFunction2D

public ImageFunction2D(java.awt.image.BufferedImage image)

ImageFunction2D

public ImageFunction2D(java.awt.image.BufferedImage image,
                       boolean alpha)

ImageFunction2D

public ImageFunction2D(java.awt.image.BufferedImage image,
                       int edgeAction,
                       boolean alpha)

ImageFunction2D

public ImageFunction2D(int[] pixels,
                       int width,
                       int height,
                       int edgeAction,
                       boolean alpha)

ImageFunction2D

public ImageFunction2D(java.awt.Image image)

ImageFunction2D

public ImageFunction2D(java.awt.Image image,
                       int edgeAction,
                       boolean alpha)

Method Detail

getRGB

public int[] getRGB(java.awt.image.BufferedImage image,
                    int x,
                    int y,
                    int width,
                    int height,
                    int[] pixels)

A convenience method for getting ARGB pixels from an image. This tries to avoid the performance penalty of BufferedImage.getRGB unmanaging the image.

Parameters:

image - The image

x - The x value of the pixel in one of the corners

y - The y value of the pixel in one of the corners

width - The width of the pixels to get

height - The height of the pixels to get

pixels - The image

Returns:

The subimage

init

public void init(int[] pixels,
                 int width,
                 int height,
                 int edgeAction,
                 boolean alpha)

Initialize an image.

Parameters:

pixels - The image

width - The width of the pixels to get

height - The height of the pixels to get

edgeAction - The edgeAction, one of ZERO, CLAMP or WRAP.

alpha - The alpha

evaluate

public float evaluate(float x,
                      float y)

Evaluate the pixel and the x and y values according to the edge action.

Specified by:

evaluate in interface Function2D

Parameters:

x - The x value

y - The y value

Returns:

The value

setEdgeAction

public void setEdgeAction(int edgeAction)

Set the edgeAction.

Parameters:

edgeAction - one of ZERO, CLAMP or WRAP.

See Also:

getEdgeAction()

getEdgeAction

public int getEdgeAction()

Get the edgeAction.

Returns:

The edgeAction, one of ZERO, CLAMP or WRAP.

See Also:

setEdgeAction(int)

getWidth

public int getWidth()

Get the width.

Returns:

The width

getHeight

public int getHeight()

Get the height.

Returns:

the height

getPixels

public int[] getPixels()

Get the pixels.

Returns:

the pixels.